Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9b1fe9f38a583a…

MALICIOUS

PDF

72.8 KB Created: 2021-02-27 19:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 67aa369d2c91965127d3a2e4830c52b8 SHA-1: 48f88010716ef1d4aa2fa929d290ec8934e39315 SHA-256: ec9b1fe9f38a583ac56f8afb4d9d1cf51c121eb0a8c664da1c0d85b905c3c96b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/award?keyword=canon+sx160+battery+charger PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416811/normal_603290681d10c.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/tz2ggRF/sijasogagalotu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_5fc5bbcba9056.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5ff7f4a5e27a4.pdfIn PDF document text
    • https://kodavagimiwebod.weebly.com/uploads/1/3/5/3/135346487/lamujalutakowusas.pdfIn PDF document text
    • https://tewuzafigew.weebly.com/uploads/1/3/4/3/134339743/66e3714c39f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_602b51c3732b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497369/normal_5fcccac2e4599.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491153/normal_5ff05f2c8d9bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470545/normal_5ffa3e80c10a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484635/normal_5fd7cc90038e5.pdfIn PDF document text
    • https://rixowumunek.weebly.com/uploads/1/3/5/3/135330445/retadukirezenafeg.pdfIn PDF document text
    • https://welomutulek.weebly.com/uploads/1/3/4/8/134873792/254092.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xuzakob/kafafakomikoxatavalora.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/codycross_answers_group_4_puzzle_1.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE126 5592 bytes
SHA-256: 85260442c31fdbeb2376bb501cd16e5611350cca68c0a4e6a8f08a441121f7d7
font_01_sfnt_off0000f430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF430 10104 bytes
SHA-256: 247fe43f4560725b2b641f8ae124456f78f0ec2bfb4745584c67a0a350acb675